Modal Analysis of Cracked Beam Based on Modified Crack Model and Perturbation Method

Long Liu; Jia Hui Shen; Da Shan Dong

doi:10.4028/www.scientific.net/AMR.753-755.977

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 753-755Modal Analysis of Cracked Beam Based on Modified...

Modal Analysis of Cracked Beam Based on Modified Crack Model and Perturbation Method

Abstract:

Structural modified crack model is deduced to analyze modal parameters of the damaged beam by using of perturbation method. Firstly, the optimal fitting formula of inertia moment at the damage location is proposed to consider damage's influence on structural stiffness and mass matrix. Then, the solutions of the first and second vibration perturbation equations are deduced. Compared with experimental results of simply-supported cracked beams, this method's reliability is proved.

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Periodical:

Advanced Materials Research (Volumes 753-755)

Pages:

977-980

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.753-755.977

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Online since:

August 2013

Authors:

Long Liu, Jia Hui Shen, Da Shan Dong

Keywords:

Crack Identification, Modal Analysis, Natural Frequency, Perturbation Method

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